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सी.आई.एस.सी.ई.आईसीएसई ICSE Class 7

How Did Neils Bohr Visualise the Atom ? - Chemistry

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प्रश्न

How did Neils Bohr visualise the atom ?

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उत्तर

Niels Bohr explained that atom is like a solar system with an empty space with a minute central nucleus, like Sun and electrons life planets revolve around it.

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अध्याय 4: Atoms, Molecules and Radicals - Additional questions

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सेलिना Concise Chemistry [English] Class 7 ICSE
अध्याय 4 Atoms, Molecules and Radicals
Additional questions | Q 18

संबंधित प्रश्न

Why is it not possible to see an atom with naked eyes?


Define:- Atom


Write the names of `"Na"_3"PO"_4` compounds :


Fill in the blank

An ion with positive charge is called ______


What does an atom consist of ? Explain.


What are orbits or shells ?


Who originated the word ‘atom’ ?


Fill in the blank

A charged particle is called an _____


What is the usual symbol for (a) and electron (b) a proton, and (c) a neutron?


Name the unit in which the radius of an atom is usually expressed.


Is it possible to see atoms these days ? Explain your answer.


Draw diagrams representing the atomic structures of the following:

  1. Sodium atom
  2. Chlorine ion
  3. Carbon atom
  4. Oxygen ion

Elements X and Y have 1 and 7 electrons in their outermost shell respectively.

Which element will gain electron?


Elements X and Y have 1 and 7 electrons in their outermost shell respectively.

Which will form positive ion?


State the meaning of the term – (a) atom, (b) molecule, (c) radical – with a suitable example.


The electronic structure [configuration] of fluorine can be written as 2, 7. In a similar way give the electronic configuration of phosphorus


The number of atoms present in a molecule is called its ______.


The most abundant type of atom is the universe is ______.


An atom of Oxygen (O) and two atoms of hydrogen (H.) combine to form a molecule of ______.


A small block slides down on a smooth inclined plane, starting from rest at time t = 0. Let Sn be the distance travelled by the block in the interval t = n – 1 to t = n. Then, the ratio `S_n/(S_(n + 1))` is ______.


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